You can use any power bank as an emergency power source.
digital voice communication system.
Auto POWER ON/OFF
Simple operation, just plug the headset.
Up to 5 users set.
Ambient noise cancelation
Connection only with paired devices.
Automatic free channel selection.
FULL DUPLEX voice.
Digitally coded conversation.
Range, depending on the conditions, up to 300 m.
Battery life 12 hours.
Extended working time with a power bank.
Battery charge time 2 - 3 hours.
Charger - mobile phone standard with mico USB plug.
Dimension 70 x 48 x 10 mm.
Weight only 45 g.
Configured as required with 3,5mm jack.
At an affordable price